// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_GFX_ANIMATION_ANIMATION_CONTAINER_OBSERVER_H_
#define UI_GFX_ANIMATION_ANIMATION_CONTAINER_OBSERVER_H_

#include "ui/gfx/gfx_export.h"

namespace gfx {

class AnimationContainer;

// The observer is notified after every update of the animations managed by
// the container.
class GFX_EXPORT AnimationContainerObserver {
public:
    // Invoked on every tick of the timer managed by the container and after
    // all the animations have updated.
    virtual void AnimationContainerProgressed(
        AnimationContainer* container)
        = 0;

    // Invoked when no more animations are being managed by this container.
    virtual void AnimationContainerEmpty(AnimationContainer* container) = 0;

protected:
    virtual ~AnimationContainerObserver() { }
};

} // namespace gfx

#endif // UI_GFX_ANIMATION_ANIMATION_CONTAINER_OBSERVER_H_
